Device for grappling lost tools in drill-wells.



'PATENTED JULY 24, 190

E. s. w. DROUGHT.

Q DEVICE FOR GRAPPLING' LOST TOOLS IN DRILL'WELLS.

APPLIOATION FILED 0QT.2, 1905- WITNESSES K "f? .dTTORJVEY.

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UNITED STATES PATENT OFFICE.

EDWARD S. W. DROUGHT, OF KANSAS CITY, MISSOURI. i DEVICE FOR GRAPPLING LOST TOOLS IN DRILL-WELLS.

Specification of Letters Patent.

Patented July 24, 1906.

Application filed October 2, 1905. Serial No. 281,023.

To all whom it may concern:

Be it known that I, EDWARD S. W. DROUGHT, a citizen of the United States, residing at Kansas City, in the county of J ackson and State of Missouri, have invented new and useful Improvements in Devices for Grappling Lost Tools in Drill-Wells, of which the following is a specification.

. from the top down to their lower ends.

My lnvention relates to improvements in devices for grappling lost tools in drill-wells, and for this purpose consists of the combination and arrangement of parts hereinafter set forth and claimed.

In the accompanying drawings, which form a part of the specification, Figure 1 represents a side view of a device embodying my invention. Fig. 2 represents a vertical section' of the same, and Figs. 3 and 4 are re spectively face and edge views of one of the plate-springs.

Similar letters indicate like parts in the several figures of the drawings.

A designates a horn socket or tube having at its upper end a thread-stem a, to which a suitable rod can be attached for operating it.

The lower end of the socket-piece is expanded and tapered, as shown at 0, so that when the plate-springs b are secured thereto there are no shoulders on the inner face or wall to contact with the tool to prevent its ready entrance therein. The plate-springs, which compose a mouthpiece, are formed of spring metal and are of the form shown in Figs. 2 and 3-broader at their lower ends than at their upper and tapering in tlIiCl IIilIGSS y are also curved intermediate of their ends, being somewhat bell shaped. The said springs encircle the lower end of the socketpiece and are secured thereto at intervals by two rows of rivets d and d, which pass, respectively, through the openings 6 and e in said springs, the upper opening, e, being in the upper straight part of the spring, while the latter opening, or e, is in the curved or bell portion of the spring. It will be noticed that owing to the hell or curved formation of the spring the lower edges of the same, which normally are separated, form a circle of greater diameter than the lower edge of the socket-piece and are adapted when in use to be in contact with the wall of the well in which outer face of the lost tool, so as to inclose it.

it is operated, so as to guide it to the Encircling the springs and bearing on the bell portion thereof and between the two rows of rivets is a metallic band f, which assists in hplding the upper ends of the springs in p ace.

The manner of operating the device is easily understood. en lowered in the well, the lower ends of the springs being guided on the side walls of the well readily pass behind or outside of the lost tool, which as the device is lowered enters the mouthpiece and the lower end of the socket and is gripped by the lower ends of the springs, so that it can be readily drawn from the well.

Having described my invention, what I desire to claim and secure by Letters Patent is 1. A device of the character described consisting of a socket-piece having secured theretoat its lower end, and encircling the same a series of plate-springs, each tapering in width bein broader at the bottom than atthe top, 311$ of greater thickness at the top than at the bottom, and each being of curved or bell shape intermediate its ends, substantially as described.

2. A device of the character described, consisting of a socket-piece with an expanded and beveled lower end, and a mouthpiece formed of separated plate-springs fastened at their upper ends to the outer side of said socket-piece, and free at their lower ends, said mouthpiece at its lower end being of greater diameter than the lower end of said socket-piece, said parts being combined substantially as described.

3. A device for the pur ose set forth com prising a socket-piece an a mouthpiece, the latter consisting of separate plate-springs secured at their upper ends by rivets to the outer lower end of said socketpiece, and having free lower ends, the said parts being combined substantially as described.

4. A device for the purpose set forth, comprising a socket-piece with a threaded upper end, a mouthpiece, consisting of separate plate-springs secured at their upper ends to said socket-piece and having free lower ends, and a metal band encircling the upper ends of said springs the lower end of said mouthpiece hem of greater diameter than the lower end of sai socket-piece.

5. A device for the purpose set forth, consisting of a socket-piece with a threaded up per end, and an expanded and beveled lower In testimony whereof I afiiX my signature end; a mouthpiece consisting of plateo-1 in presence of two subscribing witnesses. springs secured at their upper ends to sai socket-piece, and having free lower ends and EDWARD DROUGHT curved intermediate portions; and a band Witnesses:

encircling said springs; said parts being corn- SIMON B. WALLACE, bined substantially as described. JOHN L. BECKER. 

